Suction mechanism for paper-machines



(No Model.)

J REYNOLDS. SUCTION MECHANISM FOR PAPER MAGHINES.

Patented Sept. 2'7, 1892.

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UNITED STATES PATENT OFFICE.

JAMES REYNOLDS, OF FAIRFIELD, ASSIGNOR TO ROSWELL M. FAIRFIELD,

' OF HOLYOKE, MASSACHUSETTS.

SUCTION MECHANISM FOR PAPER-MACHINES.

SPECIFICATION forming part of Letters Iatent No. 483,329, datedSeptember 189 2. Application filed September 9, 11891. Serial No.405,138. (No model.)

To all whom it may concern;

Be it known that I, JAMES REYNOLDS, a subject of the Queen of GreatBritain, residing at Fairfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in SuctionMechanism for Paper-Machines, of which the following is a specification.

This invention relatesto improved mechanisrn or apparatus for insuringthe with: drawal of water or moisture from the web or layer ofpaper-stock as it is carried along on the wire apron or open-worksupport therefor.

The object of the invention is to provide. an apparatus for the purposeindicated which is available for use in connection with a layer or webof any width, which is unusually effective in the extraction of themoisture from the paper, and otherwise advantageous for reasons whichwill hereinafter appear.

The invention consists in the construction of parts, and also in thecombination and arrangement of parts, all substantially aswill behereinafter. particularly set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part ofthis invention, in which similar characters of reference indicatecorresponding parts in all of the views, and in which- Figure l is aplan view of the suction apparatus, a partonly of the web andsupporting-apron therefor being shown. Fig. 2 is a sectional elevationtaken on line 2 2, Fig. 1. Fig. 3 is a cross-section on line 3 3,Fig. 1. Fig. 4 isa section through one of the movable section-boxes forthe rolls, the plane of section through said box being indicated byline4 4, Fig. 1. Fig. 5 is a perspective view of the same. Fig. 6 is aperspective and sectional View of a portion of one of the rolls.

In the drawings, A represents a rectangular box, which forms the mainsupport for the other parts of the apparatus and largely serves in theestablishment of the suctionchamber, the said box being open at its top,its sides and bottom being closed, except as therefrom. Forpracticability of construction the ends a a of the main box A are maderemovable and are adapted to be held in place by bolts.

B B represent the suction-rolls, which have gudgeons at their ends, bywhich they are journaled in the bearings 19 b in the end walls of thebox, and the peripheries of the rolls are at or about at the level ofthe upper edges of the walls of the box. These rolls are in preferenceconstructed of a metallic hollow to orifice of the suction-pipe c, whichleads cylinder 10, with a solid wooden filling 12,

and both are bored transversely through and through at frequentintervals, as indicated at 13.

D D represent movable sections or boxes, which directly constitute endwalls of and in part serve to establish the suction-chamber within themain box A, and said section-boxes are located near the ends of the mainbox. Each box D is of a length and height corresponding to the width andheight of the inte rior of the main box A, and the side walls of the boxA have dovetail ways 9 therein, in which the dovetail extensions 11 ofthe boxes D are closely fitted. The said movable sections D are engagedby the screw-shafts G G, which are supported for rotation, but againstendwise movement, on the end walls a a. of the main box, and all so thaton turning the screws the distance of separation between the boxes maybe greater or less, in accordance with the width of the web ofpaper-stock from which the moisture is to be withdrawn.

0 represents a portion of the usual endless supporting wire-cloth apronfor the web a which runs over the top of the box A, over the upperperipheral portions of the rolls B B, and over the upper surface of themovable section-boxes D D, and as further supports for said apron therolls F F are mounted at the outside of the box A, so that the upperportions of their peripheries are at the proper supporting-level.

The movable section-boxes D are made hollow and preferably of metal,such as sheet brass or copper, and each of said boxes has at its upperportion the wall thereof of circular contour, so as to receive in theapertures d, surrounded Joy such walls, the rolls B B with as closea'fit as practicable, the upper peripheral surfaces of the rolls beingin the plane of or very slightly above the top of the section-boxes D.The bottoms and sides of said boxes are formed imperforate, while thetop wall thereof, together with the walls which comprise the greaterpart of circles and form the apertures d, have the perforations 15. Thewalls bounding the apertures d d are lined with perforated leather, as

' indicated at f, Fig. 5, to form bushings for Therefore, the suctionappliance being conthe rolls B, so that aimore efficient character ofbearing is provided between the rolls and section-boxes,the object beingto prevent unnecessary cutting and wearing of the metallic parts.

It indicates a conduit, which may be a flexible rubber hose, to beattached to a watersupply and leads to the interior of thesection-boxes, one for each, to supply water in eachbox. 7

It is intended to have the water which enters into the section-boxespractically fill the same and serve as a water packing between the rollsB B and the walls surrounding the aperture cl in said section-boxesthrough which said rolls pass. Thus a more effective suction is insuredin the suction-chamber within the main box A, which suction-chamber isconstituted at the bottom and sides. by the bottom and sides of the saidmain box A and at the end by the section-boxes D D.

nected to the suction-pipe c, the moisture which is in the web of paperx will be in part extracted through the perforations in the rolls BB,-dripping therefrom into the bottom of the suction-box, being conveyedaway by any suitable egress passage or conduit. Themost substantial andelfec'tive operation by suction upon the passing web is had between theperipheral portions of the two rolls borne upon by the web.

In the passage of the apron and web over the rolls B B said rolls arepermitted to rotate slowly in their bearings to correspond with thespeed of movement of the apron, and it will be understood that owing tothe suction transversely through the rolls the apron and web are causedto adhere more closely thereto throughout the entire width of the web,whereby the vacuum chamber will be the more nearly perfectly maintained,and whereby thepassing apron will more effectually insure the rotationof the'rolls. It is of course understood that the rotation of the rollsat a rate precisely corresponding to the travel of the wire-cloth apronis a very desirable attainment, for thereby the friction of the rollsupon the web (which might otherwise be imparted by slipping contact ofthe apron over the rolls) is measurably avoided.

The water which passes from the bearings between the rolls B B and thesection-boxes may run to the bottom of the main box A and be withdrawntherefrom in any manner expedient.

The diametrical passages through the practically solid rolls are deemedpreferable over a cylindrical perforated shell, (which latter, however,might be employed under the invention,) for such passages serve toconduct moisture received at the top directly to the under side of theroll to fall therefrom into the bottom of the box A.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-- 1. In suction mechanism for paper machines, thecombination, with the web-carrying apron and suction-chamber having theend walls thereof constituted by chambered section-boxes havingperforated curved walls which constitute apertures d and a conduit forsupplying water into said section-boxes, of one or more rolls havingperforations through them and closely fitted within said apertures,substantially as described.

2. In a suction mechanism for paper-machines, the combination, with amain box having bearings in its ends and a suction-com duit leadingthereinto, of one or more rolls B B, mounted in said bearings and havingperforations transversely through them, and section -boxes adjustable.the one toward and from the other and having apertures d (1, throughwhich said rolls pass with a close fit, substantially as described. 7 7it 3. In a. suction mechanism for paper-machines, the combination, witha suction-chamher, the end walls thereof constituted by chamberedsection-boxes having perforated curved walls forming apertures d, theperforated liningf, and a conduit for supplying water into saidsection-boxes, of one or more rolls having perforations through them andclosely fitted for rotation within said lined apertures, substantiallyas described.

4. In a suction mechanism for paper-ma chines, in combination, a boxhaving a suc tion chamber, one or more rolls rotatably mounted thereonand provided with perforations or passages which are in communicationwith said'suction-chamber, the web car rying apron movable upon saidrollers, and supporting-rollers for the apron mounted outside of andnear said suction chamber, substantially as described.

5. In a suction mechanism for paper-ma chines, a roll consisting of anouter metallic shell and a filling of wood, said roll having a series ofperforations or passages through it, and a suction-chamber andweb-carrying apron combined for operation, substantially as described,

6. In a suction mechanism for paper-machines, in combination, the box A,having the bearings b b in its ends and the suctionpipe 0 leadingthereinto, the rolls B B, hav= screws G G, and the endless web-carryingapron C, substantially as described.

JAMES REYNOLDS.

Witnesses:

H. A. CHAPIN, T. HENRY SPENCER.

